arch/arm/mach-ep93xx/vision_ep9307.c

   1 /*
   2  * arch/arm/mach-ep93xx/vision_ep9307.c
   3  * Vision Engraving Systems EP9307 SoM support.
   4  *
   5  * Copyright (C) 2008-2011 Vision Engraving Systems
   6  * H Hartley Sweeten <hsweeten@visionengravers.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or (at
  11  * your option) any later version.
  12  */
  13
  14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  15
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/irq.h>
  20 #include <linux/gpio.h>
  21 #include <linux/fb.h>
  22 #include <linux/io.h>
  23 #include <linux/mtd/partitions.h>
  24 #include <linux/i2c.h>
  25 #include <linux/i2c-gpio.h>
  26 #include <linux/platform_data/pca953x.h>
  27 #include <linux/spi/spi.h>
  28 #include <linux/spi/flash.h>
  29 #include <linux/spi/mmc_spi.h>
  30 #include <linux/mmc/host.h>
  31
  32 #include <sound/cs4271.h>
  33
  34 #include <mach/hardware.h>
  35 #include <linux/platform_data/video-ep93xx.h>
  36 #include <linux/platform_data/spi-ep93xx.h>
  37 #include <mach/gpio-ep93xx.h>
  38
  39 #include <asm/mach-types.h>
  40 #include <asm/mach/map.h>
  41 #include <asm/mach/arch.h>
  42
  43 #include "soc.h"
  44
  45 /*************************************************************************
  46  * Static I/O mappings for the FPGA
  47  *************************************************************************/
  48 #define VISION_PHYS_BASE        EP93XX_CS7_PHYS_BASE
  49 #define VISION_VIRT_BASE        0xfebff000
  50
  51 static struct map_desc vision_io_desc[] __initdata = {
  52         {
  53                 .virtual        = VISION_VIRT_BASE,
  54                 .pfn            = __phys_to_pfn(VISION_PHYS_BASE),
  55                 .length         = SZ_4K,
  56                 .type           = MT_DEVICE,
  57         },
  58 };
  59
  60 static void __init vision_map_io(void)
  61 {
  62         ep93xx_map_io();
  63
  64         iotable_init(vision_io_desc, ARRAY_SIZE(vision_io_desc));
  65 }
  66
  67 /*************************************************************************
  68  * Ethernet
  69  *************************************************************************/
  70 static struct ep93xx_eth_data vision_eth_data __initdata = {
  71         .phy_id         = 1,
  72 };
  73
  74 /*************************************************************************
  75  * Framebuffer
  76  *************************************************************************/
  77 #define VISION_LCD_ENABLE       EP93XX_GPIO_LINE_EGPIO1
  78
  79 static int vision_lcd_setup(struct platform_device *pdev)
  80 {
  81         int err;
  82
  83         err = gpio_request_one(VISION_LCD_ENABLE, GPIOF_INIT_HIGH,
  84                                 dev_name(&pdev->dev));
  85         if (err)
  86                 return err;
  87
  88         ep93xx_devcfg_clear_bits(EP93XX_SYSCON_DEVCFG_RAS |
  89                                  EP93XX_SYSCON_DEVCFG_RASONP3 |
  90                                  EP93XX_SYSCON_DEVCFG_EXVC);
  91
  92         return 0;
  93 }
  94
  95 static void vision_lcd_teardown(struct platform_device *pdev)
  96 {
  97         gpio_free(VISION_LCD_ENABLE);
  98 }
  99
 100 static void vision_lcd_blank(int blank_mode, struct fb_info *info)
 101 {
 102         if (blank_mode)
 103                 gpio_set_value(VISION_LCD_ENABLE, 0);
 104         else
 105                 gpio_set_value(VISION_LCD_ENABLE, 1);
 106 }
 107
 108 static struct ep93xxfb_mach_info ep93xxfb_info __initdata = {
 109         .flags          = EP93XXFB_USE_SDCSN0 | EP93XXFB_PCLK_FALLING,
 110         .setup          = vision_lcd_setup,
 111         .teardown       = vision_lcd_teardown,
 112         .blank          = vision_lcd_blank,
 113 };
 114
 115
 116 /*************************************************************************
 117  * GPIO Expanders
 118  *************************************************************************/
 119 #define PCA9539_74_GPIO_BASE    (EP93XX_GPIO_LINE_MAX + 1)
 120 #define PCA9539_75_GPIO_BASE    (PCA9539_74_GPIO_BASE + 16)
 121 #define PCA9539_76_GPIO_BASE    (PCA9539_75_GPIO_BASE + 16)
 122 #define PCA9539_77_GPIO_BASE    (PCA9539_76_GPIO_BASE + 16)
 123
 124 static struct pca953x_platform_data pca953x_74_gpio_data = {
 125         .gpio_base      = PCA9539_74_GPIO_BASE,
 126         .irq_base       = EP93XX_BOARD_IRQ(0),
 127 };
 128
 129 static struct pca953x_platform_data pca953x_75_gpio_data = {
 130         .gpio_base      = PCA9539_75_GPIO_BASE,
 131         .irq_base       = -1,
 132 };
 133
 134 static struct pca953x_platform_data pca953x_76_gpio_data = {
 135         .gpio_base      = PCA9539_76_GPIO_BASE,
 136         .irq_base       = -1,
 137 };
 138
 139 static struct pca953x_platform_data pca953x_77_gpio_data = {
 140         .gpio_base      = PCA9539_77_GPIO_BASE,
 141         .irq_base       = -1,
 142 };
 143
 144 /*************************************************************************
 145  * I2C Bus
 146  *************************************************************************/
 147 static struct i2c_gpio_platform_data vision_i2c_gpio_data __initdata = {
 148         .sda_pin                = EP93XX_GPIO_LINE_EEDAT,
 149         .scl_pin                = EP93XX_GPIO_LINE_EECLK,
 150 };
 151
 152 static struct i2c_board_info vision_i2c_info[] __initdata = {
 153         {
 154                 I2C_BOARD_INFO("isl1208", 0x6f),
 155                 .irq            = IRQ_EP93XX_EXT1,
 156         }, {
 157                 I2C_BOARD_INFO("pca9539", 0x74),
 158                 .platform_data  = &pca953x_74_gpio_data,
 159         }, {
 160                 I2C_BOARD_INFO("pca9539", 0x75),
 161                 .platform_data  = &pca953x_75_gpio_data,
 162         }, {
 163                 I2C_BOARD_INFO("pca9539", 0x76),
 164                 .platform_data  = &pca953x_76_gpio_data,
 165         }, {
 166                 I2C_BOARD_INFO("pca9539", 0x77),
 167                 .platform_data  = &pca953x_77_gpio_data,
 168         },
 169 };
 170
 171 /*************************************************************************
 172  * SPI CS4271 Audio Codec
 173  *************************************************************************/
 174 static struct cs4271_platform_data vision_cs4271_data = {
 175         .gpio_nreset    = EP93XX_GPIO_LINE_H(2),
 176 };
 177
 178 /*************************************************************************
 179  * SPI Flash
 180  *************************************************************************/
 181 static struct mtd_partition vision_spi_flash_partitions[] = {
 182         {
 183                 .name   = "SPI bootstrap",
 184                 .offset = 0,
 185                 .size   = SZ_4K,
 186         }, {
 187                 .name   = "Bootstrap config",
 188                 .offset = MTDPART_OFS_APPEND,
 189                 .size   = SZ_4K,
 190         }, {
 191                 .name   = "System config",
 192                 .offset = MTDPART_OFS_APPEND,
 193                 .size   = MTDPART_SIZ_FULL,
 194         },
 195 };
 196
 197 static struct flash_platform_data vision_spi_flash_data = {
 198         .name           = "SPI Flash",
 199         .parts          = vision_spi_flash_partitions,
 200         .nr_parts       = ARRAY_SIZE(vision_spi_flash_partitions),
 201 };
 202
 203 /*************************************************************************
 204  * SPI SD/MMC host
 205  *************************************************************************/
 206 static struct mmc_spi_platform_data vision_spi_mmc_data = {
 207         .detect_delay   = 100,
 208         .powerup_msecs  = 100,
 209         .ocr_mask       = MMC_VDD_32_33 | MMC_VDD_33_34,
 210         .flags          = MMC_SPI_USE_CD_GPIO | MMC_SPI_USE_RO_GPIO,
 211         .cd_gpio        = EP93XX_GPIO_LINE_EGPIO15,
 212         .cd_debounce    = 1,
 213         .ro_gpio        = EP93XX_GPIO_LINE_F(0),
 214         .caps2          = MMC_CAP2_RO_ACTIVE_HIGH,
 215 };
 216
 217 /*************************************************************************
 218  * SPI Bus
 219  *************************************************************************/
 220 static struct spi_board_info vision_spi_board_info[] __initdata = {
 221         {
 222                 .modalias               = "cs4271",
 223                 .platform_data          = &vision_cs4271_data,
 224                 .max_speed_hz           = 6000000,
 225                 .bus_num                = 0,
 226                 .chip_select            = 0,
 227                 .mode                   = SPI_MODE_3,
 228         }, {
 229                 .modalias               = "sst25l",
 230                 .platform_data          = &vision_spi_flash_data,
 231                 .max_speed_hz           = 20000000,
 232                 .bus_num                = 0,
 233                 .chip_select            = 1,
 234                 .mode                   = SPI_MODE_3,
 235         }, {
 236                 .modalias               = "mmc_spi",
 237                 .platform_data          = &vision_spi_mmc_data,
 238                 .max_speed_hz           = 20000000,
 239                 .bus_num                = 0,
 240                 .chip_select            = 2,
 241                 .mode                   = SPI_MODE_3,
 242         },
 243 };
 244
 245 static int vision_spi_chipselects[] __initdata = {
 246         EP93XX_GPIO_LINE_EGPIO6,
 247         EP93XX_GPIO_LINE_EGPIO7,
 248         EP93XX_GPIO_LINE_G(2),
 249 };
 250
 251 static struct ep93xx_spi_info vision_spi_master __initdata = {
 252         .chipselect     = vision_spi_chipselects,
 253         .num_chipselect = ARRAY_SIZE(vision_spi_chipselects),
 254         .use_dma        = 1,
 255 };
 256
 257 /*************************************************************************
 258  * I2S Audio
 259  *************************************************************************/
 260 static struct platform_device vision_audio_device = {
 261         .name           = "edb93xx-audio",
 262         .id             = -1,
 263 };
 264
 265 static void __init vision_register_i2s(void)
 266 {
 267         ep93xx_register_i2s();
 268         platform_device_register(&vision_audio_device);
 269 }
 270
 271 /*************************************************************************
 272  * Machine Initialization
 273  *************************************************************************/
 274 static void __init vision_init_machine(void)
 275 {
 276         ep93xx_init_devices();
 277         ep93xx_register_flash(2, EP93XX_CS6_PHYS_BASE, SZ_64M);
 278         ep93xx_register_eth(&vision_eth_data, 1);
 279         ep93xx_register_fb(&ep93xxfb_info);
 280         ep93xx_register_pwm(1, 0);
 281
 282         /*
 283          * Request the gpio expander's interrupt gpio line now to prevent
 284          * the kernel from doing a WARN in gpiolib:gpio_ensure_requested().
 285          */
 286         if (gpio_request_one(EP93XX_GPIO_LINE_F(7), GPIOF_DIR_IN,
 287                                 "pca9539:74"))
 288                 pr_warn("cannot request interrupt gpio for pca9539:74\n");
 289
 290         vision_i2c_info[1].irq = gpio_to_irq(EP93XX_GPIO_LINE_F(7));
 291
 292         ep93xx_register_i2c(&vision_i2c_gpio_data, vision_i2c_info,
 293                                 ARRAY_SIZE(vision_i2c_info));
 294         ep93xx_register_spi(&vision_spi_master, vision_spi_board_info,
 295                                 ARRAY_SIZE(vision_spi_board_info));
 296         vision_register_i2s();
 297 }
 298
 299 MACHINE_START(VISION_EP9307, "Vision Engraving Systems EP9307")
 300         /* Maintainer: H Hartley Sweeten <hsweeten@visionengravers.com> */
 301         .atag_offset    = 0x100,
 302         .map_io         = vision_map_io,
 303         .init_irq       = ep93xx_init_irq,
 304         .init_time      = ep93xx_timer_init,
 305         .init_machine   = vision_init_machine,
 306         .init_late      = ep93xx_init_late,
 307         .restart        = ep93xx_restart,
 308 MACHINE_END